Issues Definition and 407 Threads

This emerged from random thoughts on a story about a victim of domestic violence: http://www.bbc.co.uk/news/world-asia-16201961 Human rights groups in Bangladesh have demanded a severe punishment for the husband of a young wife who allegedly cut off most of her right hand. I believe we never...

Is anyone here experienced with NX7.5? I'm having some display issues and don't know how to tweak the video settings.

I'm sorry if this is a completely inappropriate place to post this in, but I know a number of people in this forum work or have worked in academia, and I was hoping that I might be able to get some advice. Also, since it is a physics professor specifically I'm having an issue with, I think it...

Homework Statement A particle of mass m is repelled from the origin by a force inversely proportional to the cube of its distance from the origin. Set up and solve the equations of motion if the particle is initially at rest at a distance x_0 from the origin. (This is one dimensional...

Hi everybody, I don't know if this thread is in the right place because it deals with a mix of world affairs and science. If I did post this in the wrong place, I do apologize. So my question is: Can Science be a way out of the troubles within the world today? I personally believe that...

Howdy! I'm looking for some opinions from you guys on what I should do with some troubles I am having in my chemistry class. The school I am attending has a very small, but good Physics program. The professors are top-notch and teach because they love teaching. I am choosing not to pursue...

Hi. I recently started studying differential equations, so bear with me. I started out with the following equation: y'' - 10y' -61y = xe^{-x} I know the method for solving these, but the thing I don't understand perhaps isn't the differential eq. part, rather the simplification of the...

I'm trying to make a program that prompts a user to enter a binary number and then converts the string into integers by using Integer.parseInt. Right now though, I'm having trouble with tokenizing the string. My code works when I use the predefined variable temp but not when I enter the same...

Origin of the Universe Stem Cell research Development of nuclear energy Our use of the Earth's resources and its impacts Man's growing need for energy and its impact What are the strength and weaknesses for these issues that have brought Science and Society into conflict?

I've picked up a bit more since my last problem. I need to solve the following DE: x^{2}\frac{dy}{dx}+x(x+2)y=e^{x} I decided to use variation of parameters, so I re-arranged it like so: \frac{dy}{dx}=\frac{e^{x}}{x^{2}}-(1+\frac{2}{x})y Then solved the homogenous DE...

First http://www.scientificamerican.com/article.cfm?id=splitting-time-from-space" THEN http://www.rense.com/general28/erin.htm" and NOW the super neutrino radiation evidence of faster - than - light motion. Should we have seen this coming? Also here's something I've always...

Currently there are clear indications that there is a strong case for a phenomenon of http://en.wikipedia.org/wiki/Peak_oil" . 1. The International Energy Egency, who was traditionally very conservative about it (and still is), recently admitted that it occurred in 2006 for conventional sources...

I am working on a problem trying to find out why a 0.010” orifice can be used to open a pilot actuated, spring return pneumatic 5/2 directional control (spool) valve, but a 0.0045” orifice only seems to work intermittently. The air system that I am working with is 100 psig. The air enters...

See post 2 in this thread, none of the latex lines are working now (they were working before), post 4 is slightly messed up: https://www.physicsforums.com/showthread.php?t=306442 In post 8 in this thread one of lines is messed up: https://www.physicsforums.com/showthread.php?t=360987...

I just can't figure out how you arrive at having a diagonal matrix consisting of Jordan blocks. Going by Lang, a vector is (A - λI)-cyclic with period n if (A - λI)ⁿv = 0, for some n ∈ℕ. It can be proven that v, (A - λI)v, ..., (A - λI)ⁿ⁻¹ are linearly independent, & so {v, (A - λI)v, ...

A second is measured thus: "the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium atom." What if the cesium atom itself is moving close to the speed of light? Would that not change the time...

Hi any idea what is the most relevant website to find out [FONT="Arial Black"]OrCAD PSpice ebooks, application notes and tutorials and how to resolve its convergence issues in [FONT="Arial Black"]Switch Mode Power Supplies simultions. Please be precise and quick. :cool:

I had issues with dandruff for a long time. Once my second kid was born, I went two weeks without a shower. My dandruff basically went away. Since then I've been showering with water only. My hair has become way healthier and my skin is all a consistent color and doesn't get scraped and...

I am trying to build the instrument according to this link http://www.inventgeek.com/2009-Projects/Laser-Instrument/page5.aspx I am having problems with lasers.I can not focus the laser dot on the photoresistor.So I thought about laser array(fabricated)but i could not find it.So I am now...

Greetings I have been trying to find the orbit of Mercury using the geodesic equations with the Schwarzschild Metric, more precisely I have been using the equations derived in "General Relativity, An Introduction for Physicists" by M.P. Hobson, etc, that is: <math>\left(1-\frac{2\mu}{r}\right)...

Hi all, The question is: Given that X follows a geometric distribution, prove that P(X>j+k | X>k) = P(X>j). So this is all I have: P(X>k+j) = (1-p)^k+j, (a proof covered in the text)...

I have third (and final) round of interviews scheduled for next week with Qualcomm. The Qualcomm job is full-time, and in Colorado. In short, it's my dream job. Medtronic has been calling me and asking if I am interested in a job opportunity there, a contractor position which is less...

So in Griffith's (ed. 2 page 37) there's an equation that says that **pretend the h's are h-bars...I don't know Latex very well** ih\frac{1}{\varphi}\frac{d\varphi}{dt}=-\frac{h^{2}}{2m}\frac{1}{\psi}\frac{d^{2}\psi}{dx^{2}}+V Since in this simplified case V where is a function of x alone...

The problem is we don't know if it's a real floating box design. I have tried to find out information about Fukushima I foundation type but hasn't been able to find it. Anybody else luckier? Just because there is a thick bottom concrete doesn't make it a floating box. If it's a floating box...

I was walking down the hallway at work and saw a poster. Someone must have put it up outside their office. It said that falling asleep with the TV on reduces the bodies production of melatonin. So I looked it up and found an interesting article on Discovery.com...

Hi, I'm trying to enter a spacetime with makeg(spacetime_name): on GRTensor II. I'm just following the simple example in the documentation, but instead of doing what it's supposed to (e.g presenting me with text offering me certain options and then me selecting say option 1-4) and presenting...

Dear All, I am using gnuplot to make plots from data files generated using a fortran program. Those data files are basically big lists of 3d coordinates, just like like (not my real data, just an example): 10.0 1.00 0.01 20.0 1.00 0.14 ... So, when I use splot, I...

Hello, I was just wondering if anybody could give me any ideas about a possible direction in a Physics issues investigation. I am looking at choosing one around nuclear energy and the issues of radiation. Any help or interesting sugestions of avenues in nuclear physics, and or possibe guiding...

Homework Statement Simplify: 3c-(\frac{2a+c}{8}-\frac{a+2c}{4}) The Attempt at a Solution I got this: \frac{9c}{8} But the answer is: \frac{27c}{8} It's simply an issue with whether I find the LCM or I use this formula: \frac{a}{b}-\frac{e}{f}=\frac{a*f-b*e}{f*b} If...

Issues with Discrete Fourier Transform in Mathematica Maybe someone else had this problem. Lets say we have a sampled Gaussian pulse in time domain and transform it into frequency domain. For that I use the discrete Fourier transform. Now the resulting set of transformed values is made up of...

i have one problem for pumping treated water in line 4 bars there is no suitable pump with this suitable head so what is the procedures for series instlations ?

I have problems with my code.As a result of calculation I got rank2 l(21,1) array.Due to the THE ITERATIVE PROCESS I will get the same array in every iteration.How to allocate values and use them later.Should I create new array like do iter=1,n lbig(iter,nmax,1)=l(nmax,1)?

Question) A solid is formed by revolving the area inside x^(2/3)+y^(2/3)=a^(2/3), a>0; to the right of x=0 and above y=0 about the line x=a. Find the Volume of the solid using; A) The washer Method B) Cylindrical Shell Method I am at a loss at how to set up this problem...I understand how to do...

Hi all, I am working on a robotics problem and I have to get the determinant of a 3X3 matrix in symbolic form. The expressions are quite complex, Matlab 7.10.0 solves the expression in about 30 seconds but cannot display the answer. I would need to copy and paste this answer into another...

LaTeX don't work with Spoiler. Why ?

Homework Statement A wire lies along the piecewise linear curve extending from the point (2,2) to the point (12,4) to the point (12,9). If the density of the wire is given by (xy)=2xy+6x, use a line integral to find the mass of the wire. Homework Equations The Attempt at a Solution...

So I heard that some physics and astronomy graduate programs are going through major funding issues right now. For example, one school I know only accepted about 5 students out of 150 for the phD admissions this year for their Astronomy dept (they're haven't been super-competitive like that in...

I am trying to solve the tension in the cable system and I can not get to the answer. See attached file for question 4-4 and 4-6. I have no clue as to what to do with the 100 kg weight on the 4-4 problem. As for 4-6. I came up with 7 T at the p arrow, and when I multiply that to 3 for...

Consider the space curve x = cos t, y = sin t, z = sin^2 t. (1) Without plotting this curve, show that this curve lies on the cylinder x^2 + y^2 = 1. (2) Plot this curve (without the cylinder), then use the appropriate rotations to see the planar projections on the xy-plane, the xz-plane and...

Got issues? Dependency? Abuse? Control? Letting go, giving up, giving in? Grandiosity, narcissism, neurosis, nefariousness, spitting on people? Obsession, compulsion, bad dreams, daydreaming, hair splitting, nail biting, biting other people's nails, Dodgers fan? Here's your chance to generally...

Homework Statement A 138 cm length of string has a mass of 4.98 g. It is stretched with a tension of 6.35 N between fixed supports. What is the wave speed for this string? What is the lowest resonant frequency of that wave? (wavelength) = 138cm = 1.38m M = 4.98g = 0.00498kg Ft =...

hi there, how can i show that the lie brocket is not connection? Many thanks =)))

First off, let me apologize in advance because I'm pretty sure this isn't the right forum for this question, but I've tried to find an appropriate forum and haven't had a lot of success. I know some people here have been really helpful to me in the past, so I figured that someone could at least...

Hi everyone, I didn't know where to really post this but I have an essay which I must write for an engineering course which relates to land tenures. I need to find an article which has enough information for me to write and essay or other sources. Is anyone familiar with any land tenure...

Assignment: TicTacToe and TicTacToeGame. The TicTacToe class contains a 3x3 two-dimensional array of integers. The constructor should initialize the empty board to all zeros. It should have a method playerMove that accepts two integers as parameters, the first is the player (1 or 2) and the...

Just a few concise questions...I'd really appreciate anyone's input here.. How often is it regular (to you, personally) to feel inadequate or have low self-esteem? Regardless of how often...how do you deal with low self-esteem/body image/adequacy issues? Does the magnitude of the...

Homework Statement Integrate from 0 to sqrt(pi/2). I can't figure out how to make the LaTeX work correctly for it, so it just looks like an indefinite integral. \int 7\theta^3cos(\theta^2) d\theta Homework Equations \int udv = uv - \int vdu The Attempt at a Solution First...

So i know instruments need A TON OF PRACTICE but the problem with me is that i get bored too fast to play instruments. I've been practicing on my guitar now for 3 months but man i can only play it for 30 minutes tops and then i get seriously bored and start going on the computer. I can't help it...

Homework Statement You are driving to the grocery store at 16 m/s. You are 130 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.50 s and that your car brakes with constant acceleration. x1 = 0 m v1 = 16 m/s t1 = 0 s x2 = ? v2 = 16 m/s t2 =...

Bear with me if you notice any botched ideas in my writing, I'm working on it. Initially I was wondering about direct injection of ATP. But I ran into a roadblock... First - Is it possible to isolate ATP from a source and make a high concentration ATP solution or even pure ATP? (extraction...